How to replace the brake master cylinder on GMC Terrain?

To start replacing the brake master cylinder drain the brake fluid out from the reservoir with proper tools before disposing it properly. Disconnect the master cylinder fluid level sensor electrical connection and primary brake pipe fitting without disturbing the fluid. Close the pipe end and install a master cylinder outlet port plug to control fluid loss. Orders the attachment of the secondary brake pipe fitting just like before. Sever the 2 master cylinder nuts then extract the master cylinder. With new master cylinder installation remove both the reservoir and cap from the factory part and discard the retention pins and seals. Plug the master cylinder outlet until you put new reservoir seals into place and restore the cylinder assembly with fresh retaining pins. Test the new master cylinder brake function through a bleeding process before adding it to the vehicle. Mount the master cylinder into its place and fasten it with both master cylinder nuts before tightening the nuts to 25 Nm (18 lb ft). Join the master cylinder fluid sensor electrical connector before tightening the primary and secondary brake pipe fittings to 18 Nm (13 lb ft). End the brake fluid bleeding process.

OEM GMC Terrain Brake Master Cylinder

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GMC Terrain Master Cylinder Part Number: 19151463
$85.41 MSRP: $240.49
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Product Specifications
- Other Name: Cylinder Kit, Brake Master; Brake Master Cylinder; Cylinder Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010 GMC Terrain | SLE, SLT | 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L GAS
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GMC Terrain Master Cylinder Part Number: 20990924
$259.65 MSRP: $503.95
You Save: $244.30 (49%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 20916576, 25933425
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | Denali, SL, SLE, SLT | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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GMC Terrain Master Cylinder Part Number: 84667590
$82.90 MSRP: $160.89
You Save: $77.99 (49%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 84104229
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2023 GMC Terrain | AT4, Denali, SL, SLE, SLT | 4 Cyl 1.5 L GAS, 4 Cyl 1.6 L DIESEL, 4 Cyl 2.0 L GAS

GMC Terrain Brake Master Cylinder

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Brake Master Cylinder is one of the significant parts of GMC Terrain brake system to apply hydraulic pressure equivalent to the foot pressure of the driver. This hydraulic pressure is then transferred to the slave cylinders which in turn apply the brakes through the use of the necessary friction to make the vehicle to stop. Most often it is equipped with mechanical elements such as pistons, seals, spring and made of cast iron or aluminum, as for the fluid tanks they can be either incorporated or extra. Year by year, GMC Terrain vehicles have employed dual circuit master cylinders, and this has always been a strategic measure; in that, if the first circuit is not able to supply the required braking force, the second circuit can help in supplying the force. This design factor makes the unit safe as an override still enables continued operation even if the hydraulics have failed. Some of the problems that users have reported about the Brake Master Cylinder are a leakage of the fluid and internal problems that would reduce the overall brake power.

GMC Terrain Brake Master Cylinder Parts and Q&A

Master Cylinder
19151463
Q: How to replace the brake master cylinder on GMC Terrain?
A:
To start replacing the brake master cylinder drain the brake fluid out from the reservoir with proper tools before disposing it properly. Disconnect the master cylinder fluid level sensor electrical connection and primary brake pipe fitting without disturbing the fluid. Close the pipe end and install a master cylinder outlet port plug to control fluid loss. Orders the attachment of the secondary brake pipe fitting just like before. Sever the 2 master cylinder nuts then extract the master cylinder. With new master cylinder installation remove both the reservoir and cap from the factory part and discard the retention pins and seals. Plug the master cylinder outlet until you put new reservoir seals into place and restore the cylinder assembly with fresh retaining pins. Test the new master cylinder brake function through a bleeding process before adding it to the vehicle. Mount the master cylinder into its place and fasten it with both master cylinder nuts before tightening the nuts to 25 Nm (18 lb ft). Join the master cylinder fluid sensor electrical connector before tightening the primary and secondary brake pipe fittings to 18 Nm (13 lb ft). End the brake fluid bleeding process.